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fDesc[0] = "Displays graphs of algebraic functions in a variety of forms. These include polar and cartesian co-ordinates, parametric and intrinsic functions. A wide range of functions are built-in, from simple trig and hyperbolic functions to things such as the ceil and gamma functions. On-screen HTML help is bulit-in. <br /> <br /> Functions can be defined such as <br /> f(x)= 1 + x<br /> These can be of unlimited complexity, and can refer to other functions such as<br /> g(x) = f(x) + 2*x<br /> Other variables can be set up, so we can define for example<br /> f(x) = m*x + c<br /> and then vary m and c and see the change to the graph.<br /> <br /> It will also handle differentiation, integration, sums and products of series. It will deal with Maclaurin and Fourier series, such as a Fourier approximation to a square wave.<br /> <br /> The graph limits can be altered in various ways - zoom in and out, center, left right up down and direct entry. Mouse wheel does zoom in and out.<br /> <br /> A chord can be displayed on a function, with the slope of the chord calculated and displayed.";

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